Bob LLC. Is planning to install a new IT system and has determined the activities that are needed for the project and is shown below. (20 points) Activity Activity Predecessor Optimistic time 5 3 Most likely time 8 12 Pessimistic time 17 15 A B w un 4 7 10 a D un co 23 a E Activity Description Recruiting System development System training Equipment training Manual testing System Changeover Computer interface System modification System testing System 1 1 1 1 b, c F 1 4 13 b, G 3 6 9 d, e H 1 2.5 7 d, e 1 1 1 1 h 2 N 2 h J 2 2 2 testing System installation Equipment changeover f,g k 5 5 8 11 8.1 NOTE: To draw the diagram you can use pen and paper If It's easy for you and then scan it and upload it on Canvas. You can also use Excel or Word. A. Draw the network diagram very clearly. (5 Points) B. On the network diagram clearly show the earliest and latest activity times, and activity slack. (10 Points) C. From the above network diagram show the critical path, duration of the expected project completion time and variance along the critical path. (5 Points) D. Determine the probability that the project will be completed in 40 weeks or less (5 Points)